Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of anthocyanins.
Synonyms:
exact_synonym:
positive regulation of anthocyanin anabolism; positive regulation of anthocyanin biosynthesis; positive regulation of anthocyanin formation; positive regulation of anthocyanin synthesis; up regulation of anthocyanin biosynthetic process; upregulation of anthocyanin biosynthetic process
narrow_synonym:
activation of anthocyanin biosynthetic process; stimulation of anthocyanin biosynthetic process